From 5f769e9b78a61d6b69355a6aae8572128a8f54a3 Mon Sep 17 00:00:00 2001 From: Paul Selkirk Date: Tue, 10 Feb 2015 15:06:55 -0500 Subject: Reformat verilog code for readability. --- rtl/src/verilog/rng_selector.v | 128 ++++++++++++++++++++--------------------- 1 file changed, 63 insertions(+), 65 deletions(-) (limited to 'rtl/src/verilog/rng_selector.v') diff --git a/rtl/src/verilog/rng_selector.v b/rtl/src/verilog/rng_selector.v index 7a1fe7c..f86b3e9 100644 --- a/rtl/src/verilog/rng_selector.v +++ b/rtl/src/verilog/rng_selector.v @@ -40,72 +40,70 @@ //====================================================================== module rng_selector - ( - input wire sys_clk, - input wire sys_rst, - input wire sys_ena, + ( + input wire sys_clk, + input wire sys_rst, + input wire sys_ena, - input wire [13: 0] sys_eim_addr, - input wire sys_eim_wr, - input wire sys_eim_rd, - output wire [31 : 0] sys_read_data, - input wire [31 : 0] sys_write_data - ); - - - // - // Output Register - // - reg [31: 0] tmp_read_data; - assign sys_read_data = tmp_read_data; - - - /* So far we have no RNG cores, let's make some dummy 32-bit registers here - * to prevent ISE from complaining that we don't use input ports. - */ - - reg [31: 0] reg_dummy_first; - reg [31: 0] reg_dummy_second; - reg [31: 0] reg_dummy_third; - - always @(posedge sys_clk) - // - if (sys_rst) begin - reg_dummy_first <= {8{4'hA}}; - reg_dummy_second <= {8{4'hB}}; - reg_dummy_third <= {8{4'hC}}; - end else if (sys_ena) begin - // - if (sys_eim_wr) begin - // - // WRITE handler - // - case (sys_eim_addr) - 14'd0: reg_dummy_first <= sys_write_data; - 14'd1: reg_dummy_second <= sys_write_data; - 14'd2: reg_dummy_third <= sys_write_data; - endcase - // - end - // - if (sys_eim_rd) begin - // - // READ handler - // - case (sys_eim_addr) - 14'd0: tmp_read_data <= reg_dummy_first; - 14'd1: tmp_read_data <= reg_dummy_second; - 14'd2: tmp_read_data <= reg_dummy_third; - // - default: tmp_read_data <= {32{1'b0}}; // read non-existent locations as zeroes - /* - default: tmp_read_data <= {32{1'bX}}; // don't care what to read from non-existent locations - */ - endcase - // - end - // - end + input wire [13: 0] sys_eim_addr, + input wire sys_eim_wr, + input wire sys_eim_rd, + output wire [31 : 0] sys_read_data, + input wire [31 : 0] sys_write_data + ); + + + // + // Output Register + // + reg [31: 0] tmp_read_data; + assign sys_read_data = tmp_read_data; + + + /* So far we have no RNG cores, let's make some dummy 32-bit registers here + * to prevent ISE from complaining that we don't use input ports. + */ + + reg [31: 0] reg_dummy_first; + reg [31: 0] reg_dummy_second; + reg [31: 0] reg_dummy_third; + + always @(posedge sys_clk) + // + if (sys_rst) begin + reg_dummy_first <= {8{4'hA}}; + reg_dummy_second <= {8{4'hB}}; + reg_dummy_third <= {8{4'hC}}; + end else if (sys_ena) begin + // + if (sys_eim_wr) begin + // + // WRITE handler + // + case (sys_eim_addr) + 14'd0: reg_dummy_first <= sys_write_data; + 14'd1: reg_dummy_second <= sys_write_data; + 14'd2: reg_dummy_third <= sys_write_data; + endcase + // + end + // + if (sys_eim_rd) begin + // + // READ handler + // + case (sys_eim_addr) + 14'd0: tmp_read_data <= reg_dummy_first; + 14'd1: tmp_read_data <= reg_dummy_second; + 14'd2: tmp_read_data <= reg_dummy_third; + // + default: + tmp_read_data <= {32{1'b0}}; // read non-existent locations as zeroes + endcase + // + end + // + end endmodule -- cgit v1.2.3